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Re: Lamar Hires speaks on CCR Cave Bailout

The Optima as well as most of the units out there use smaller bottles for the breathers with no access OC to them.

Not sure that is correct. My Optima came with a second stage connected to the DIL. Maybe it has changed since the earlier units, but it was there FWIW.

I personally don't care to really consider my onboard DIL in my BO planning for anything other than an intermediate step from the loop to my BO. I have always carried two BO bottles, but I generally have the left connected to my offboard gas block and its 2nd stage deployed around my neck. The right is stowed, but I have a LP hose connected to my drysuit. I think I'll try keeping the right completely stowed and either use a drysuit inflation bottle or run off my left hand cylinder.

Re: Lamar Hires speaks on CCR Cave Bailout

What I have actually observed is no OC to most divers on board gas. I wouldn't either with a 19 or 20 cf supply. My suit inflation is from an argon supply. My buoyancy is from diluent on board between CL volume and wing.

We have found that on multi day diving in depths 20 - 40 msw, diluent was down 10 cf after 4 dives and 5 hrs BT. MCCR is very frugal. In cave we top off before every dive and deep we use a different configuration.

Roger, when the OPV gave us chronic problems we replaced it with a very stiff BC type. No problems since. We just nose vent the CL's

Same with the ADV, when it always was a source of leakage, we got rid of it and now use only a MAV.

Psquared, "Second stages that are finger tight on the hoses so they can be swapped easily if needed (keep the odd Poseidon out of the mix ) as well as the willingness and ability to swap out regulators underwater."

I used to do that until one decided to part company in a cave. I carry a gerber tool now and don't finger tighten any connection.

Re: Lamar Hires speaks on CCR Cave Bailout

It seems that most people are missing Lamar's message. I think that Lamar is stressing the simple point of redundancy -- one 80 is not the same as two 40's. With two 40's, you have two first and second stages not just one of each. The choice of gas supply is dependent upon the dive and individual team members requirements. Other post address the need for redundant oxygen and are very relevant for expedition diving, but not for the type of diving that he talks about in the video. I am glad that RBW posted the videos of all of the speakers and all of the comments generated get people thinking about safety.

Re: Lamar Hires speaks on CCR Cave Bailout

Originally Posted by stats1984

It seems that most people are missing Lamar's message. I think that Lamar is stressing the simple point of redundancy -- one 80 is not the same as two 40's. With two 40's, you have two first and second stages not just one of each. The choice of gas supply is dependent upon the dive and individual team members requirements. Other post address the need for redundant oxygen and are very relevant for expedition diving, but not for the type of diving that he talks about in the video. I am glad that RBW posted the videos of all of the speakers and all of the comments generated get people thinking about safety.

Exactly

When i dived OC I would take two stages even on a 40m-50m deco dive.

32% and 80%.

The 32% would act as deep bailout to back up the back gas and the deco could be done on back gas + 32% or back gas and 80%

If all went well the 32 + 80 combo gave very short deco in comparison with say a single 80 of 50% which was useeless at max depth and provided a non redundent deco.

However i have a problem with his theory.

On CCR I am always carrying a deep bailout and a deco gas. Does he sugest i carry four tanks?

Carrying two 40s in a shalow Mexico cave is fine by me but carrying four on a 60m dive is too much kit stress.